Six-wheel-truck bolster



Aug. 5 1924.

- RICHARDSON SIX-WHEEL TRUCK BOLSTER Filed Aug. 6. 1923 2 Sheets-Sham lAug. 5 1.924.

. 1,503,517 L. RICHARDSON SIX-WHEEL waucx BOLSTER Filed Au 6, 192; 2Sheets-Sheet 2 Patented Aug. 5, 1924 a ri a'ii rt eee ety fi son an at Kn y ah mre edwe ta new and useful n5 ovements Sixlilbeellese 1 dates: airl ih the t wn asres ieetion-v sf r vhih'isi te re y the dist bution.of the E l e p A a re p trueksadapted to irements under servlce me etthe varlous requ ggndjtjons v s a These and other objects areaccomplished by means of the arrangement disclosed on the." accompanyingsheet of drawings, in whichp e a Figure 1 is a fragmentary top plan viewof a railway car truck embodying my invention; V

Figure 2 is side elevation of the same car truck;

Figure 3 is a top plan view of my improved bolster;

s Figure 4 is a front elevation of the same; and i J i F igure 5. is aside elevation of said bolster.

"The various novel features of 'the'invention will beapparent from thefollowing description and drawings, and will be par-r ticularly pointedout in the appended claims. j

7 Referring' to the figures of the drawings, it will be notedthat-myinvention is illus trated in connection with .a six-wheel truckhaving side frames 10 (only one of which is sliow:n):,-having end,journal box openings 11 for the reception of end journal boxes 12, and0penings'13 through which V transverse bolster members 14 extend. The

-- izing levers 15 having pedestal jaws for the reception of anintermediate journal box 17 and the other equalizing lever cooperatingwith its associated equalizing lever for assesses asca apsss, 01s

" *i srx-wrinnn-rngnc on 'filed August 6, 163

st ait atss ri glo s re ease itt menswear nsm t ns loads- 05 1 nermediat 3' alo i Q 6 e dsv 1t a mit e -fr m the ansver e;bel t nmemerssl; a h 1 1 h-ifiQeds e ssi b te lrthe semeste s ib ie 2. free the tth -su mmiiiteg i ally formed. The tlnrd lag'lstejljt iuiit comprisesthe-main bolster member 19 which recast;

is separate from theotherbolster members and is supported 'by thelongitudinal bolster members 18, preferably by having its outer endsextend through openings 20 in longitudinal bolster members-18 andresting upon the floor of said openings. The main bolit,

ster member 19 carr'ies the center plate and transmits the loads to thelongitudinal bolster members 18'which, in turn, transmit theloadstotransverse bolster members 14 from which the loads are through theequalizing levers to the various journal boxes, as above described. g

a 'Each, longitudinal bolster member is integrally formed with itsassociated trans verse bolster member 14 at a point on said transversebolster member about one-quarter of its lengthfrom one end thereof Thefree end of each longitudinal bolster mem ber 18 has 21 which'fitoverreduced portions 22 of the other transverse bolster member 14 in amanner to formv a flexible connection between such bolster members forgiving the required fiexure tothe bolster construction forequalizing-the CllSU'llOUblOIl of distributed a theloads. At'thesametime the releasable or v slidable joint connections between the free endof each longitudinal bolstermemberand the opposite transverse bolstermember is the free ends of the longitudinal bolster members 18 areloosely joined with the op- V posite transverse bolster members 14.These joints or points of contact are comparatively far apart and inview thereof any playin these joints will. have but little effect on theamount the four le s or bolster members 1e and 18 can get out of squarewith respect to each other. This also reduces the rolling resistance ofthe truck as well as the wear of the wheel flanges. If desired, in orderto simplify the foundry operation, the transverse bolster members 14 maybe cast separately from their associated longitudinal bolster members 18and then securely connected to form the two separate units, each unitconsisting of onetransverse bolster member I l and a longitudinalbolster mem ber 18. In each case, however, a longitudinal bolster member18 will have a sliding joint connection with the opposite transversebolster member for giving the required amount of fiexure for loadequalizing and at the same time minimize the extent to which thetruckcan get out of square.

The side bearings may be carried by either the main bolster 19 or by theinterlocking bolster members, but preferably the side bearings arelocated on the main bolster 19 outside the longitudinally extendingbolster members 18.

It is my intention to cover all modifications of the invention fallingwithin the spirit and scope of the following claims.

I claim:

1. In a bolster for six-wheel trucks,the combination of a. unitarytransverse bolster member and longitudinal bolster member, and a secondunitary transverse bolster member and longitudinal bolster member, saidunits being separate and interlocked for giving the required flexure forload equalizing and at the same time minimize the extent to which thetruck can get out of square.

2. In a bolster for six-wheel trucks, the combination of a unitarytransverse bolster member and longitudinal bolster member, and a secondunitary transverse bolster member and longitudinal bolster member, saidunits being separate and interlocked for giving the required flexure forload equalizing and at the same time minimize the extent to which thetruck can get out of square, and a main bolster member for transmittingloads to said bolster units.

3. In a bolster for six-wheel trucks, the combination of two integrallyformed bolster units, each bolster unit includin a transverse bolstermember and a longltudinal bolster member, said units being flexiblyconnected for load equalizing and at the same time connected in a mannerminimizing the extent to which the truck can get out of square.

4. In a bolster for six-wheel trucks, the combination of two separateunits, each unit including a transverse bolster member integrally formedwith a longitudinal bolster member, each of said units having a jaw forreleasably slidably fitting a portion of the other unit for giving therequired flexure for load equalizing and at the same time minimizing theextent to which the truck can get out of square.

5. In a bolster for six-wheel trucks, the combination of two separateunits, each unit including a transverse bolster member integrally formedwith a longitudinal bolster member, each of said units having a aw forreleasably slidably fitting a portion of the other unit for giving therequired flexure for load equalizing and at the same time minimizing theextent to which the truck can get out of square, and a main bolstermember connecting the longitudinal bolster members.

6. A bolster for six-wheel trucks comprising three units, two of saidunits each comprising a transverse bolster member integrally formed witha longitudinal bolster member, each longitudinal bolster member beingflexibly connected to the opposite transverse bolster member to form aline of fiexure diagonally across the bolster for equalizing thedistribution of the load and at the same time minimize the extent towhich the truck can get out of square,.the third bolster unit connectingthe longitudinal bolster members.

7. In a bolster for six-wheel trucks, the combination of a unitarybolster member having a. transversely extending portion and alongitudinally extending portion, a second unitary bolster member havinga transversely extending bolster portion and a longitudinally extendingbolster portion, said units being separate and interlocked for givingthe re quired fiexure for load equalizing, said longitudinally extendingbolster portions having seats, and a main bolster member carried by saidlongitudinally extending portions and having bearings outside of saidseats. Signed at Chicago, Illinois, this 3rd day of August, 1923.

LAWRENCE RICHARDSON.

